Don't require isearch-update before isearch-done
It is useful to be able to call `isearch-done' unconditionally to ensure a non-isearching state. * lisp/isearch.el (isearch-done): Check that `isearch--current-buffer' is a live buffer before using it (Bug #21091). * test/lisp/isearch-tests.el (isearch--test-done): Test it.
Showing with 12 additions and 3 deletions